じたい辞退jitai
1.

The act of voluntarily rejecting an offer, privilege, or opportunity, such as an invitation or nomination, often done to demonstrate humility or consideration for others.

2.

A formal decision to not accept a position, award, or other forms of recognition, usually accompanied by an expression of gratitude or respect for the opportunity.

3.

The choice to withdraw from participation or competition, often reflecting a desire to prioritize personal values or circumstances over ambition or duty.

Example:

芥川賞の受賞を辞退したいのですが。